| Autor: |
Ajit Kumar Naik, Lava Kumar Pillari, Kyle Lessoway, Lukas Bichler, Tapas Laha, Siddhartha Roy |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
Open Ceramics, Vol 19, Iss , Pp 100653- (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2666-5395 |
| DOI: |
10.1016/j.oceram.2024.100653 |
| Popis: |
In this study, functionally graded ZrB2–B4C–SiC–LaB6 composite materials (FGMs) with potential applications in hypersonic aircraft thermal protection systems were fabricated using spark plasma sintering. A systematic study of the thermal conductivity of the FGM, the conductivity of respective FGM layers, and the equivalent non-graded composites, was performed from room temperature up to 450 °C. The results suggest that the thermal conductivity of the FGMs (in the through-thickness direction) and their equivalent non-graded composites ranged between 25 and 34.9 W/mK, which was ∼60 % less than ZrB2. While the overall thermal conductivity of the FGM and equivalent non-graded composites were similar, in the FGM, the topmost layer with high ZrB2-content displayed up to 245 % higher thermal conductivity than the bottom layer with high B4C content. A systematic comparison between experimentally determined conductivity and relevant thermal conductivity models was conducted. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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